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Parallel multiplex laser feedback interferometry
Review of Scientific Instruments, 2013We present a parallel multiplex laser feedback interferometer based on spatial multiplexing which avoids the signal crosstalk in the former feedback interferometer. The interferometer outputs two close parallel laser beams, whose frequencies are shifted by two acousto-optic modulators by 2Ω simultaneously. A static reference mirror is inserted into one
Song, Zhang, Yidong, Tan, Shulian, Zhang
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An Electronic Quadrature Technique for Laser Interferometry
Applied Optics, 1967The (LFI) Laser Feedback Interferometer consists of a cw laser and an external retroreflector (Fig. 1). This interferometer has the advantage of requiring no tedious alignment other than that of positioning the retroreflector so that the returned laser beam is approximately centered.
J W, Campbell, V, Erbert
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III Interferometry with Lasers
1987Publisher Summary This chapter focuses on interferometry with lasers. The development of the laser made available for the first time an intense source of light with a remarkably high degree of spatial and temporal coherence. The use of lasers has removed most of the limitations of interferometers imposed by thermal sources and has led to the ...
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Pulsed HF Laser Holographic Interferometry
Applied Optics, 1975Two-dimensional holographic interferometry has been accomplished at wavelengths near 3 microm. The source is a pulsed hydrogen fluoride oscillator-amplifier system. Transverse excitation is achieved with a fast bank discharging into a simple electrode configuration.
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Multipass Laser Interferometry for Plasma Studies
Review of Scientific Instruments, 1971A simple matrix optic theory of multipass laser interferometers shows how a relatively vibration proof system can be easily set up. Measurements made with such systems of the decay of a helium plasma are presented.
N R, Heckenberg, W I, Smith
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Imaging focused laser differential interferometry
Optics LettersFocused laser differential interferometry (FLDI) is an important diagnostic for measuring density fluctuations in high-speed flows. Currently, however, high dynamic range FLDI is limited to photodiode measurements. In order to spatially resolve multiple locations within complex flows, we present a novel, to the best of our knowledge, refractive-optic ...
Andrew W. Marsh +3 more
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Laser sources and laser interferometry with optical fibers
SPIE Proceedings, 2011At present time the DFB (Distributed FeeBack), VCSEL (Vertical Cavity Surface Emitting Laser) and FBG (Fiber Bragg Grating) based laser diodes are suitable like laser source for using in laser interferometry. Their linewidth of the emission spectrum and the mode-hop free tuning range of the wavelength are crucial parameters for laser sources in laser
B. Mikel, Z. Buchta, J. Lazar, O. Cip
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Particle sizing using laser interferometry
Applied Optics, 1977The theory and conditions are summarized under which single spherical particles in the size range of a few micrometers and larger may be sized using the observed fringe visibility in a cross-beam laser velocimeter. Scalar diffraction theory and experimental data are presented to show how the size information in the forward- scattered light is dependent
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Laser-Speckle-Interferometrie anwenden / Application of Laser Speckle Interferometry
Materials Testing, 1998Andreas Ettemeyer +1 more
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